Hello, I wanted to write a Beam code which expands incoming `PCollection<>`, element wise, by use of existing IO components. Example could be to have a `PCollection<ResourceId>` which will hold arbitrary paths to data and I want to load them via `HadoopFormatIO.Read` which is of `PTransform<PBegin, PCollection<KV<>>`.
Problem is, I do not know how or if it is possible at all. 1. I do not see a way how to element wise apply `PTransform<PBegin, ..> (hence reuse some existing IOs). Is it poossible? 2. If I would want to write such logic custom, is it doable in Beam model? Thanks, Jozef
